The centuries last passed have also given the taste important extension; the discovery of sugar, and its different preparations, of alcoholic liquors, of wine, ices, vanilla, tea and coffee, have given us flavors hitherto unknown.

The torrent of centuries rolling over the human race, has continually brought new perfections, the cause of which, ever active though unseen, is found in the demands made by our senses, which always in their turns demand to be occupied.

Vegetables, which are the lowest in the scale of living things, are fed by roots, which, implanted in the native soil, select by the action of a peculiar mechanism, different subjects, which serve to increase and to nourish them.